This is a high-performance external SSD case that supports up to 4 M.2 SSDs and 40Gbps. The item for sale is **"new and unopened" as shown in images 1 and 2**. ※ Images 3-5 are reference images showing the operation of a different unit. Please note that these are not the items for sale. Specifications/Features Compatible Drives: NVMe M.2 SSD (up to 4) Maximum Speed: 40Gbps Heat Dissipation: High heat dissipation performance with an aluminum enclosure, equipped with a cooling fan Tool-less Design: Easy to attach and detach (M.2 SSDs are secured with screws) ⚠ Important Notes If the USB port or cable is less than 40Gbps (e.g., USB 3.1 Gen1 or Gen2), the transfer speed will be limited. With M.2 Gen3 SSDs, you can generally achieve **maximum performance (around ~3,500MB/s)**. Please note that with M.2 Gen4 SSDs, speeds of 5,000-7,400MB/s will not be achieved due to specifications.